From ff78c30a428c116d73a1ba16e53961a3a8894200 Mon Sep 17 00:00:00 2001
From: Hugo Buddelmeijer <hugo@buddelmeijer.nl>
Date: Fri, 14 Feb 2020 10:43:03 +0000
Subject: [PATCH] Fix tectonic support

---
 git-latexdiff              | 19 +++++++++++++------
 tests/tectonic/run-test.sh | 15 +++++++++++++++
 2 files changed, 28 insertions(+), 6 deletions(-)
 create mode 100755 tests/tectonic/run-test.sh

diff --git a/git-latexdiff b/git-latexdiff
index 18960b3..b05b9bc 100755
--- a/git-latexdiff
+++ b/git-latexdiff
@@ -656,12 +656,14 @@ do
     verbose_done
 done
 
-if [ "$ignorelatexerrors" = 1 ]; then
-    latexopt="$latexopt -interaction=batchmode"
-elif [ "$quiet" = 1 ]; then
-    latexopt="$latexopt -interaction=nonstopmode"
-else
-    latexopt="$latexopt -interaction=errorstopmode"
+if test $tectonic != 1; then
+  if [ "$ignorelatexerrors" = 1 ]; then
+      latexopt="$latexopt -interaction=batchmode"
+  elif [ "$quiet" = 1 ]; then
+      latexopt="$latexopt -interaction=nonstopmode"
+  else
+      latexopt="$latexopt -interaction=errorstopmode"
+  fi
 fi
 
 # Option to use latexdiff --flatten instead of latexpand
@@ -789,6 +791,11 @@ elif test "$uselatexmk" = 1; then
 	compile_error=1
 	error_msg="command 'latexmk' failed."
     }
+elif test "$tectonic" = 1; then
+    log_cmd tectonic.log tectonic $latexopt "$mainbase.tex" || {
+	compile_error=1
+	error_msg="command 'tectonic' failed."
+    }
 else
     log_cmd pdflatex1.log $LATEX_EXEC $latexopt "$mainbase" || {
 	compile_error=1
diff --git a/tests/tectonic/run-test.sh b/tests/tectonic/run-test.sh
new file mode 100755
index 0000000..4c768eb
--- /dev/null
+++ b/tests/tectonic/run-test.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+die () {
+    echo "fatal: $*"
+    exit 1
+}
+
+cd "$(dirname "$0")/../bib" || exit
+
+old=b9a200a6a0c45d6c594cb3c5473edd81a7edb52c
+new=cbce899ba408849a471461bb9b5d648bf02039ef
+
+echo "git latexdiff with --tectonic should work"
+../../git-latexdiff --tectonic -v $old $new > tectonic.log 2>&1 ||
+	die "latexdiff with --tectonic failed."